July 2025 in “Russian Journal of Clinical Dermatology and Venereology” Botulinum toxin is not proven effective for treating hair loss.
February 2023 in “Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ/Tikrit journal of pure science” Horse skin has a layered epidermis, a dermis with hair follicles, sweat and sebaceous glands, and is supplied by small arteries.
Depressed individuals have higher hair sodium and potassium levels, similar to changes seen in astronauts.
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January 2015 in “Hair therapy & transplantation” Some supplements and hormones can increase hair loss by raising DHT levels.
Raising serum ferritin levels can improve symptoms like fatigue and hair loss, even if hemoglobin levels are normal.